Better Crafts Silver Coated Square 3" Mirror Tiles - Can Be Used in Many Craft Projects, Decorations & Mosaics. (100) 3 inch silver coated square mirror tiles. These mirrors are a great addition to any mosaic craft project, scrapbook layout, greeting card, and much more! 3 inch Square - 2mm thick. Can be etched or painted on for unique design applications. Perfect for use indoors or outdoors.